NE0XY
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Hi,
So I recently acquired two EVGA 980 SC cards. When I first tried them to see if they worked etc I connected 4 cables to my psu, two 6 pins for each card.
I know I got a cable that has two 6 pin connectors on it. Can I connect the cable so that one 6 pin is in one card, and the other 6 pin is in the second card, and then the same with another cable? Or should both of the 6 pins be in the same card? Or should I just keep using four 6 pin cables? =P
I have the EVGA Supernova P2 1200 so I got plenty of space for cables in it.
Thank you for your help and sorry if I'm confusing anything with my english
//NE0XY
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rjohnson11
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Re: How should I properly power my two 980's?
2015/05/25 01:55:33
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The EVGA PSU you own has six (6+2 pin) PCI-E cables. In my personal opinion use one cable from the PSU for each 6 pin PCI-E connection. In total, this will be 4 cables. 
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NE0XY
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Re: How should I properly power my two 980's?
2015/05/25 07:40:40
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Alright thanks.
Just curious, what's wrong with the other method?
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the_Scarlet_one
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Re: How should I properly power my two 980's?
2015/05/25 08:04:07
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You could connect one of the 6 pins to one card, and one to the other, but you have to realize that only a certain amount of power can go through the single cable. Just because it is split at the end doesn't mean it will work the same as two cables.
There was a build log over on OCN, where the user had 4 card, and had the extra 6 pins pretty much braided throughout the build. It was beautiful, but highly impractical. That was a show computer, not an every day driver.
To properly power your cards, which you should want, you should use one per card and the extra on the same card, and not run them with all cables to one and spares to the other.
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stalinx20
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Re: How should I properly power my two 980's?
2015/06/12 06:35:00
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Scarlet-Tech
You could connect one of the 6 pins to one card, and one to the other, but you have to realize that only a certain amount of power can go through the single cable. Just because it is split at the end doesn't mean it will work the same as two cables.
There was a build log over on OCN, where the user had 4 card, and had the extra 6 pins pretty much braided throughout the build. It was beautiful, but highly impractical. That was a show computer, not an every day driver.
To properly power your cards, which you should want, you should use one per card and the extra on the same card, and not run them with all cables to one and spares to the other.
Scarlet, I'm trying to understand this part... Are you saying you should not take all 4 GPU cables and connect each individual sleeve into each seperate 6pin connector, but rather just use 2 cables with 2 split (on 2 cards)?
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Afterburner
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Re: How should I properly power my two 980's?
2015/06/12 07:19:50
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Yeah, his last sentence lost me as well...
I would just add to what RJ said... I have built a lot of systems and found for proper performance and life of the GPU, that a good quality PSU that has one connection for each GPU plug in works best.
In other words... If you have three GPU's that allow for/need six total connections, all six connections are going to come direct from the PSU. No splitting!
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stalinx20
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Re: How should I properly power my two 980's?
2015/06/12 07:36:36
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Afterburner
Yeah, his last sentence lost me as well...
I would just add to what RJ said... I have built a lot of systems and found for proper performance and life of the GPU, that a good quality PSU that has one connection for each GPU plug in works best.
In other words... If you have three GPU's that allow for/need six total connections, all six connections are going to come direct from the PSU. No splitting!
Right now i have 2 actual "cables" going to (1) card. Is this correct? So, when my 2nd 980 arrives, i'll take the 2 extra cables that i have, plug them into my PSU, and hook them up to the 2nd GPU, right?
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Vlada011
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Re: How should I properly power my two 980's?
2015/06/12 08:58:50
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Yes. One connector in PSU for one connector on graphic card, card have two connector that mean two connectors/cables. For two cards you will need 4 connectors/cables and 2 place on PSU will stay free free. 850 G2 model have everything what someone could need one day maybe, two CPU cables, 2 for Molex (fans, controllers), 4x SATA for HDD, SDD and 6xVGA. If someone want could properly to connect even 3 cards as GTX970/GTX980 because power consumption is lower.
post edited by Vlada011 - 2015/06/12 09:00:56
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stalinx20
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Re: How should I properly power my two 980's?
2015/06/12 09:17:14
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Vlada011
Yes.
One connector in PSU for one connector on graphic card, card have two connector that mean two connectors/cables.
For two cards you will need 4 connectors/cables and 2 place on PSU will stay free free.
850 G2 model have everything what someone could need one day maybe, two CPU cables, 2 for Molex (fans, controllers),
4x SATA for HDD, SDD and 6xVGA. If someone want could properly to connect even 3 cards as GTX970/GTX980 because power consumption is lower.
Perfect, thanks for the clarification. I have the 850 GS series though =/
post edited by stalinx20 - 2015/06/12 09:19:37
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Brian Walker
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Re: How should I properly power my two 980's?
2015/06/18 01:12:56
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 Right now I`m using the 2 split cables on my 770`s. EVGA has told me this is perfectly acceptable. But I`m gonna use the 4 separate cables on the 2 new 980 Ti SC cards.
post edited by Brian Walker - 2015/06/18 01:27:00
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Afterburner
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Re: How should I properly power my two 980's?
2015/06/19 06:11:58
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In all reality... If you are just gaming, there is nothing wrong with using one cable with a jumper to each GPU.
However, if you are going to fold or crunch or push your system to "Max power" you would be wise to run two independent power cables to each GPU.
Let me put it this way... Look at how the lower end model are designed with one connection, and ask yourself why the higher end GPU's have two, and the elite power hungry monsters have three...
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